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11.-The water supply has been off for days.
-Yes.The workers ________one of the main pipes.(  )
A.had repairedB.have repaired
C.repairedD.have been repairing

分析 句意:--已经停水很多天了.--是的,工人们一直在修理主管道.

解答 答案;D.had done"过去的过去";have done"过去发生的动作对现在的影响";have/has been doing"过去发生的动作一直持续到现在,可能刚刚结束,还可能继续持续下去".根据句意,停水很多天了,工人们"一直"在修理主管道,说明修理这个动作从过去开始,可能还会继续持续下去,故选D.

点评 本题考查现在完成进行时,要熟悉不同时态的用法并结合具体的语境选择出正确选项.

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